Incandescent gas-burner.



PATENTED 00T. 8, 1907. 'R. N. OAKMAN". v INGANDESCENT GAS BURNER.

APPLIOATION FILED 11,111.1, 190e.

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R. N. OAKMAN. INGANDBSCENT GAS BURNER.

APPLICATION ILBD MAR. l. 1906.

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PATENTBD 00T. a, 1907.

PATENT OFFICE.

RICHARD N. OAKMAN, OF BROOKLYN, NEW YORK.

INCANDESCENT GAS-BURNER.

Specification of Letters Patent.

Patented Oct. 8, 1907.

Appncaaon filed March 1,1906. serial No. 303,652.

T0 all whom it may concern:

Be it known that I, RICHARD N. OAKMAN, a citizen of the United States, residing at Brooklyn, in the county of Queens and State of New York, have invented certain new and useful Improvements in Incandescent Gas-Burners, of which the following is a specification.

This invention relates to gas burners, particularly adapted for incandescent gas lamps, or for use with mantles which are made incandescent by the combustionof a mixture of gas and air.

The object of my invention is to provide a simplied and improved construction of the parts or devices composing a burner of the Bunsen type and having a pilot tube for igniting the main volume of gas without causing an explosion thereof or other injurious action upon the mantle or chimney atthe time of ignition.

One oi the special objects of my invention is to provide means for directing the gas, which flows through the regulating valve, in strong vertical streams into the mixing chamber so as to provide for better drawing in air and mixing it with the gas and forcing the mixture to the top of the chamber where it is ignited.

Another object of my invention is to provide devices for admitting gas to the pilot tube burner at the time that the main supply of gas is cut off from the main burner, and to cut off the supply of gas to the pilot tube at the instant that gas is admitted to the main burner, so that when gas is flowing to, and is ignited at the main burner, the pilot light will be extinguishedy thereby preventing soiling of the mantle by soot or carbon from the pilot burner while the main burner is lighted. The extinguishment of the pilot burner at this time is desirable since it burns with a yellow flame and might interfere with the brilliant whiteness of the incandescent mantle. It also results in saving some gas which should be admitted to the main burner.

Another object of my invention is to provide iinproved details of construction by which the burner can be cheaply made and the parts readily assembled and will be durable and effective in operation.

The matter constituting my invention will be defined in the claims.

I will now describe the details of construction and the operation of my improved burner by reference to the accompanying drawings, in which* Figure 1 represents an elevation of the burner with parts in section. Fig. 2 represents a vertical section of the lower part of the burner on enlarged scale. Fig. 21l represents a detail view of' tne air shutter. Figs. 3 and 4 represent, respectively a vertical section and a top view oi a cap or thimble. Fig. 5 represents a top view and Fig. 6 a bottom'view of a valve-disk. Fig. 7 represents a vertical section of a modification oi a cap, valve-disk and connecting parts. Fig. 8 represents a top plan view of a modified cap. Figs. 9 and 10 reprelFig. 14 represents a tp plan view of the same.

sent, respectively a top and bottom view of a slightly modified valve-disk. Figs. 11 and 12 represent vertical sections ot' the same, Fig. 12 showing a slightly modified construction. Fig. 13 represents a vertical section of a modified construction of a base piece. Figs. 15 and 1G represent, respectively a top View and a bottom view of a modified valve-disk and arm. Figs.

17 and 18 represent vertical sections, respectively on the lines 17 and 18, Fig. 15. Fig. 19 represents a vertical section of a modified tubular bolt. Fig. 19 represents a cross-section of a bolt, Fig. 19. Fig. 20 represents a section of a modified valve disk. Fig. 21 represents a sectional view of a modified construction. Fig. 22 represents a modified bolt.

The burner pillar A is preferably constructed in the form shown in Figs. l and 2 with a base 1, having an internally screw-threaded socket 2 and an external screw thread 3, and an annular shoulder 4. The air chamber is preferably constructed of an inverted cone 5 and an upper conical portion 6 having a cylindrical vextension 7. The inverted cone 5 and the conical portion 6 may be united at their bases by a suitable joint 3 as shown in Fig. 1, and at such joint there may be connected a downwardly projecting circular flange or curtain 3b for covering the air-ports as shown. The lower inverted cone 5 is provided With air-ports 8 and with a horizontal elongated opening 9 for receiving a set-screw lever or projecting arm of a valve-disk. Within the inverted cone 5 is placed a close fitting air shutter 10 having openings 11 corresponding to, and adapted to register with the air-ports 8. The air shutter l0 is also pro-f vided with a projecting arm or lug 12 for turning the same. An upper mixing chamber 13 having at the top the usual cap 14 and gauze cover may be applied to the cylindrical part 7 oi the pillar in a usual and well known manner. Any desired form of basket l5 may be used for supporting the chimney.

The b ase 1 may be made open at both ends and the upper end closed by a removable cap 16 which may rest at its lower edges upon theannular shoulder 4.

This cap is preferably provided with a large central opening 17 and with two or more circumferential openings 18, as shown in Figs. 3 and 4. These openings 18 are preierably made elongated and tapering as' show 'for gradually admitting gas to the mixing chamber s the valve-disk, above, is turned to open them less or more.

Upon the cap I6 is seated a thick valve-disk 19 of substantially the same diameter as the cap, and having a central opening 20 and two or three circumferential openings 21 as shown in Figs. 5 and 6. v

Though three openings 21 are shown in Figs. 5 and G I may .use only two of such openings as shown in Figs. 9 and l0. These openings 21 are comparatively wide at the base or under side oi the disk 19 and are tapered upward to the upper suriace of the disk as shown in Figs. 2, 11 and 12. This shape and elongated orm ol gas opening is important for causing the currents of gas which are passed through the openings in the cap to be straightened upward and discharged in strong vertical streams into the upper mixing chamber, producing the desired Bunsen eii'ect. These gas openings in the disk 19 may be tapered as shown in Fig. 11 or may be made as shown at 21, Fig. l2, with a larger cylindrical bore at the base, then a tapered portion to the smaller cylindrical bore passing through the top oi the disk. The disk 19 is also provided with a radial horizontal opening or passage 22 for receiving the set-screw lever 23 as shown in Figs. 2 and 7. reduced inner end 23L where it enters the tubular bolt 25 and with a screw threaded portion 21 which screws into the opening 22, and with an outer knob or head 24. The reduced inner end may have a needlepoint 23b asshown inFig. 7. This set-screw lever 23 serves to regulate the tiow oi gas to the pilot tube and ior turning the valve-disk 19 upon the cap, also causing the cap and center' bolt to turn together. The center bolt 25 is preferably drilled to orm a longitudinal bore or passage 27 and is provided at its lower end with a head 26, While the upper end is externally screw threaded to receive the securing nut 30. In assembling the parts a Washer 28 is, preferably, placed at the under side oi cap 16 and against this washer is placed the spiral spring 29, or any other desired orm ol spring. The spiral spring 29 bears upon washer 28 and upon the head 26 oi the bolt. The upper part oi the bore or passage 27 is enlarged for receiving the pilot tube 31 as shown in Figs. 2 and 7. By means oi the nut 30 and spring 29 the valve-disk 19 will be clamped to the cap 16 so as to prevent leakage oi gas but still permitting the disk to be readily turned and adjusted to admit more or less gas through the openings 18 and 21.

As shown in Figs. 2 and 7 a transverse opening is made in the bolt 25 ior receiving the reduced end 23*l or 23b of the set-screw lever 23. screw can be adjusted to regulate the ilow ot gas through the pilot tube 31.

In order to provide ior shutting gas off from the pilot tube when the main supply oi gas is admitted to the main burner the valve-disk 19 may be provided with an angular opening 32 extending vertically irom the un- .der face of the disk and then at right angles to the central opening 20 as shown in Fig. 7. When the parts are assembled as here shown the needle-point 23b of lever 23 will project into the passage 32 for controlling the amount oi gas which passes into the pilot tube. In this modiiied construction I preferably provide two gas openings 18 in the cap and two openings 2l in the disk 19 to register therewith for supplying the main burner7 and I also provide a third opening 18, Fig. 8, in the cap adapted to register with the gas passage 32 in the disk for separately supplying gas to the pilot tube. These openings in the cap and disk 19 will be so placed that when disk 19 is turned to close the openings 18 in the cap the passage 32 will be caused to register with the opening 18Il just before the gas is entirely shut off from the openings 21 in the disk. The arrangement is also such that when the disk 19 is turned to cause the openings 21 to register with the openings 18 in the cap This set-screw is made with a two gas passages 21 as shown in Figs. .16 and 18.

Evidently this setv the passage 32 will be turned away irom the opening 18and thereby cut ott' the llowol` gas to the pilot burnt-r.

Instead of providing a sejrarate cap lli as shown in Figs. 2 and 3 I may provide a base l, Fig. 13, which is bored nearly through from the lower end to the up per end, but leaving at the upper' end a top plate lo which is provided with a central opening tor center bolt and with gas openings, as before described. 'lhe valve-disk 19n above the plate 16 will be inade thick as shown in Figs. 17 and 18 and provided with a lateral arm or lever 23*I as an integral part thereof as shown in Figs. and 16. rl`he underside oi this disk I9 is provided with a short indentation or groove 32 extending radially from the central bolt opening between the ln this inodilied construction the center bolt is inado with two opposite Hat sides and is provided with a central bore extending trom the upper end to near the middle and having a right angle bore 27 to its outer surface as shown in Fig. 19. This angular bore or passage 27l registers with the groove 32 so as to torni a passage way for gas when the groove 32 is caused to register with the openingl 18, Fig. lll7 in the top plate 16, thus supplying gas to the pilot tube which is inserted in the upper end oi' the center bolt 2:3" as previously described. The central opening 20" in disk I9"I is made with two opposite flat sides to receive the bolt 25, having correspondingly [lat sides, and cause the same to turn with the disk when it is turned and con trol the iiow oi gas either to the main burner or to thc pilot burner. This modilied construction ol` parts is simpler and less expensive than the construct ion shown in Figs. 2 and 7. lt will be noticed that in the con struction shown in Figs. 7 and 19 the longitudinal bore 27 in the bolt 25 extends downward from the upper end and at right angles but does not extend through the lower end oi the bolt. The parts shown in Ifigs. 13 to 19, inclusive will be assembled substantially like the corresponding parts in Figs. 2 and 7.

Instead of making the valve-disk 19 thick, as shown in Figs. 2, 7 and 11, I may make it'. of comparatively thin metal as shown at 19", Fig. 20, and raise the lnelal in two places to form tapering conical gas passau-e. giving a long travel to the currents ol gas and 1 g them to straighten up and escape in strong vertical streams or currents into the mixing chamber. The comparatively, long tapering passages produce the et'- iect of an injector, causing the gas to pass in strong jets into the mixing chamber, and thereby aid in drawing in the necessary amount o1' air through the ports 8. The disk-valve may be punched out with an ear or lug 19C which may be turned up and provided with a. screw threaded opening to receive the set screw 23 which may be set up against the nut 30, and serve as a lever to turn the disk-valve 19 or 19".

Instead oi providing a center bolt with opposite llat sides as shown in Fig. 19 I inay provide a bolt 25", Fig. 22, with a circular' groove 33 on a line with the angular passage 27 so that the gas passage 32" in the disk-valve will always register with this groove and allow gas to pass into the passageway 27" and thence to the pilot tube. It will be understood that gas will pass to the pilot tube when the radial groove 32" regis ters with the opening 18 in the cap 16 or in the top plate 16 in the base 1", Figs. 13 and 2l.

`the usual injurious explosions which occur when the The parts being assembled, as shown in Fig. 2 or Fig. 7 or Fig. 21, the disk Valve is turned so that the gas is first admitted to the pilot tube and lighted at the burner thereof. With the construction shown in Fig. 2, it will only be necessary .to turn the set-screw lever 23 so as to open the passage-Way 27, thereby permitting gas to flow into the pilot tube. With the construction shown in Fig. 7 the set-screw lever 2S will be adjusted to open the passage-way 32 in the disk valve 19, also the passage-way 27, and then the disk valve 19 will be turned to cause the passage-way32 to register with the opening 181L in the cap, when gas will flow to the pilot burner and may be lighted. In case of the modied construction shown in Figs. 16, 18 and 21, it will only be necessary to turn the disk valve till the radial groove or channel 32*L registers with the opening 181L in the cap or top plate 1G of the base.

The pilot burner being lighted, it will only be necessary .to turn the disk valve 19 part of a revolution to admit gas to the main burner. It the disk valve 19 is turned so that its passages 21 register only partly with the elongated openings 18, in the cap 16, that is, so that the disk partly. covers the openings 18, a comparatively small iiow of gas will pass into the mixing chamber oi the burner, and the small streams or currents so passed would be weak and deiected if it were not for the comparatively long andtaperingports or passages 21 in the disk valve. These tapering passages 2l when only partly registering with openings 1S straighten up'the deflected currents of gas and cause them to shoot upward in strong straight streams into the mixing chamber, producing the desired Bunsen effect and drawing in the requisite proportion oi air to the point of ignition. With a rotary disk having the usual straight holes, when` the disk is turned to only partly open the holes in the cap, making offsets from one to the other, the currents of passing gas will be diverted in different directions into the mixing chamber and will be so weak that they will not effectively draw in air for making the necessary mixture of gas and air to produce the best results. With my rotary valve disk, having tapering gas ports or passages, this detect is overcome and improved results secured'.

It will be understood that with the construction` shown in Figs. 7 and 21 the pilot burner will be extinguished so soon as gas is admitted to the main burner and ignited. It is quite important that it be extinguished at this time for the reason that if the pilot burner is left open the iow of gas to the main burner increases the draft in the pilot tube, thereby causing an objectionable long. flame at the pilot burner, in other words, the turning on of gas through the main ports and its flow to the main burner lengthens the pilot flame and tends to cool down the blue Bunsen flame within the mantle, also to deposit carbon on the mantle. By providing a pilot burner within the mantle gas is ignited are entirely avoided. Ordinarily the l flame of the pilot burner is very small and little more than. a blue flame so that the amount oi gas burned s insignificant. The pilot Haine being within the mantle is protected from drafts so that it is not liable to be accidentally extinguished.

Having described my invention, what I claim, and desire to secure by Letters Patent, is-

1. ln an incandescent burner, the combination with the base and a fixed plate at the to`p thereof having gas ports, of a rotatable valve-disk mounted thereon and having vertically long or extended passages adapted to register with said ports in the fixed plate, a tubular center bolt and nut connecting said valve-disk and plate and a setscrew levell engaging with said disk and extending into the passage of the tubular bolt for controlling the iiow of gas therethrough, substantially as set forth.

2. In an incandescent burner, the combination with the baserand a fixed plate at the top thereof having gas ports, of a rotatable valve-disk thereon and. having vertically long tapering' ports of greater' diameter at the base and adapted to register with said ports in the fixed plate, for causing` the passing currents of gas to shoot straight up into the mixing chamber and draw in the desired proportion of air, and a center bolt and nut connecting said disk and plate, substantially as described.

In an incandescent burner, the combination with the base and a fixed plate at the top thereof having gas ports, o1 a rotatable valve-disk-fhereon andhaving tapering gas passages adapted to register witlrthe ports in the fixed plate, a tubular center bolt and nut connecting said valvedisk and plate, a pilot tube connecting with said bolt and a set-screw lever engaging with said valve disk and enterA ing the tubular bolt for controlling the iiow of gas to the pilot tube, substantially as described.

4. ln an incandescent burner, the combination with the base and a fixed plate at the top thereof having ports for admitting gas to the main burner and a separate port for admitting gas to the pilot tube, of a rotatable valve-disk thereon having gas passages therethrough, adapted to register with said ports in the fixed plate, also having a passageway leading to the center, a center bolt having a longitudinal bore or passage and a lateral opening therefrom adapted to register with said passageway in the valvedisk, and a pilot tube connecting with the passageway in the center bolt, whereby gas may bo cutoff' from the pilot tube when it is admitted to the main burner, or cut off from the main burner when it is admitted to the pilot tube, substantially as described.

In an incandescent burner, the combination with the base and a fixed plate at the top thereof having gas ports for a main burner and a pilot tube, of a rotatable valve-disk thereon having gas passages adapted to register with said ports for the main burner in the fixed plate, also having a passageway from its under side to its center, a center bolt passing through said plate and disk and having a longitudinal gas passage and a lateral passage thereupon adapted to register with said passage in the disk, a setscrew lever havingl a conical end or needle point entering the longitudinal passage of the bolt and passageway in the disk, substantially as described.'

(i. ln an incandescent burner, the combination with the base and a cap lifted thereon and having elongated gas ports, of a rotatable valve-disk thereon and having tapering gas passages adapted to register With said ports in the iixed plate, a tubular center bolt passing through said cap and disk and having a lower head, a spring between said head and the cap, a securing nut applied to the upper end of said bolt, a pilot tube connecting with the passageway of the bolt and a set-screw lever engaging with the disk and center bolt, substantially as described.

In testimony whereof I aiiix my signature in presence of two witnesses.

RICHARD N. OAKMAN.

Witnesses S. E. OAKMAN, A. C. OAKMAN. 

